Induction heating is used in many industrial applications to heat electrically conductive materials. The coupled electromagnetic-thermal induction heating process is non-linear in general, and for ferromagnetic materials it becomes challenging since both the electromagnetic and the thermal responses are non-linear. As a result of the existing non-linearities, simulating the induction heating process is a challenging task. In the present work, a coupled transient electromagnetic-thermal finite element solution strategy that is appropriate for modeling induction heating of ferromagnetic materials is presented. The solution strategy is based on the isothermal staggered split approach, where the electromagnetic problem is solved for fixed temperature fields and the thermal problem for fixed heat sources obtained from the electromagnetic solution. The modeling strategy and the implementation are validated against induction heating experiments at three heating rates. The computed temperatures, that reach above the Curie temperature, agree very well with the experimental results.

感应加热在许多工业应用中用于加热导电材料。耦合的电磁-热感应加热过程通常是非线性的，对于铁磁材料，由于电磁和热响应都是非线性的，因此变得具有挑战性。由于现有的非线性，模拟感应加热过程是一项具有挑战性的任务。在目前的工作中，提出了一种适用于模拟铁磁材料感应加热的耦合瞬态电磁-热有限元求解策略。求解策略基于等温交错分裂法，其中电磁问题求解固定温度场，固定热源的热问题由电磁求解获得。针对三种加热速率的感应加热实验验证了建模策略和实施。达到居里温度以上的计算温度与实验结果非常吻合。